Multiprocessor system formed of a plurality of duplex processors

Details Multiprocessor system formed of a plurality of duplex processors Multiprocessor system formed of a plurality of duplex processors

1995-10-06

1997-12-16

Beausoliel, Jr., Robert W.

Excavating

371 82, G06F 1134

Patent

active

056995040

ABSTRACT:
A multiprocessor system includes duplex processors, each duplex processor having two processors, one being active and the other being a stand-by processor. Each processor includes a central processing unit (CPU) and main storage, the CPU being able to access the main storage in the other processor of the duplex processor. Each duplex processor is interconnected through communication buses to enable communication between any processors, and a particular processor can read a program file from program file storage and send it to each processor. For updating from an old program file to a new program file, each duplex processor is able to access each communication bus to identify an usable communication bus for each target processor, to set any communication bus to an active communication path for each target processor, and to transmit/receive data on the active communication path while setting another communication bus as a stand-by communication path. During operation of the active CPU using the old program file, the new program file is read to the main storage of the stand-by CPU, and the new program file of the stand-by CPU is started from the active CPU. Operation of the new program file in communicating between stand-by CPUs is confirmed by CPUs by using the stand-by communication path set by the active CPU, and setting all stand-by CPUs to the active CPU so that the program file is updated.

REFERENCES:
patent: 5155847 (1992-10-01), Kinovac et al.
patent: 5434998 (1995-07-01), Akai et al.
patent: 5530949 (1996-06-01), Koda et al.

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